ABSTRACT
@#The plasma matrix is a kind of autologous blood conduct. It has been widely used in maxillofacial tissue regeneration, skin cosmetology and some other fields. Recently, to preserve the dental pulp as well as the teeth, pulp regeneration therapy and apical surgery have become increasingly important as well as the applications of bioactive materials. As a kind of autologous bioactive material, the plasma matrix has some natural advantages as it is easy to obtain and malleable. The plasma matrix can be used in the following cases: ①pulp revascularization of young permanent teeth with open apical foramina that cannot stimulate apical bleeding; ② apical barrier surgery with bone defects and large area perforation repair with bone defects or root sidewall repair surgery; ③ apical surgeries of teeth with large area of apical lesions, with or without periodontal diseases. The plasma matrix is a product derived from our blood, and there are no obvious contraindications for its use. Several systematic reviews have shown that the plasma matrix can effectively promote the regenerative repair of dental pulp in patients with periapical diseases. However, the applications of plasma matrix are different because its characteristics are affected by different preparation methods. In addition, there is still a lack of long-term clinical researches on the plasma matrix, and the histological evidences are difficult to obtain, so a large number of in vitro and in vivo experimental studies are still needed. This article will describe the applications of different kinds of plasma matrix for dental pulp regeneration and bone tissue regeneration in apical surgeries to provide references for clinicians in indication selection and prognosis evaluation.
ABSTRACT
@#Oral squamous cell carcinoma (OSCC) is the most common oral cancer. Previous studies have found significantly high miR-155 expression in OSCC. However, the mechanism by which miR-155 plays a role in OSCC oncogenesis is not yet clear. This article reviews the function of the relationship between miR-155 and tumors and the potential role of miR-155 in the development of OSCC. A literature review showed that mir-155, as a small carcinogenic RNA, can inhibit CDC73, BCL6, P27Kip1 and other target genes that play a role in cancer inhibition; promote the proliferation, migration and invasion of OSCC cells; and inhibit apoptosis. miR-155 can also be combined with biological factors (Epstein-Barr virus, human papillomavirus) to promote the development of OSCC.